I haven't played the whole game yet but I understand roughly some of the mechanics in the game:
The first way to unlock the H scene is to look at the neighbor's shop. The neighbor will sleep between 12pm and 2pm, open the door and rape her.
like that you will get 5000 yen but money is not important right now
every time you play with your neighbor you will get a certain amount of money try everything you can to earn H scene until your friend gives you a miniature camera and now the money will come into play
I can only play like that